Phonograph.



C.P.TRUNDY.

PHONOGRAPH. APPLICATION FILED DBG.10, 191s.

Patented Sept. 8, 1914...

CHARLES E. TBWZDY, 01" EBOSTQN, MASSACSETTS.

rnouoonnrn.

niiones.

Speciilcation of lettersletent.

.Pettenited Sept. 9 31914.,

Application filed December 1c, 3913. Serial 310. $05,788.

To all whom it may concern."

Be it known that l, CHARLES FYI-runny, a citizen of the United States, residing at Boston, in the county ofgsuiiolk and State of Massachusetts, have invented certain new and useful Improvements in Phonogrephs;

and I do hereby declare the following to he a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the some.

The present invention relates to an improveinentjin phonogruphs. In machines adapted for reproducing sounds from hilland-dale cut records, the sound box is rigidly supported on the end of the tone tube which is "fed laterally across the record as the needle point travels along the. record groove. The spacin 'of the grooves is not always uniform with the feed of the tone tube, and provision is made for inequalities between the feed demanded by the record groove and the feed of the tone tube, lay

! mounting the needle upon the sound box in 25 such a way as to permit slight movements of the needle support with respect to the tone tube in order that the needle may correctly adapt itself to the sound groove. Machines of the hill-and-dule type impart" vertical vibrations to the'reproducing needle and they are not, therefor adapted to reproduce sounds from later. cut records in which the sound vibrations are represented by lateral undulations of the sound groove. These recordsiinpart lateral vibrations to the needle point and the needle arm transmits these vibrations to the diaphragm which is mounted in position to receive the lateral vibrations imported to it by the rec oid through the medium of the needle and needle arm. in order to adapt the hill-anddale machine to reproduce sounds from lutera] cut records,it is necessary that itbe provided with a lateral cut record sound box and a flexible connection between such sound box and the tone tube.

The object of the present invention is to produce a connection tube ior-hill-anddale phonogrophs for connecting the sound loox to the tone tube so as to adapt it touse lnt.

erul cut records.

To thenbove end the present invention consists in the tube hereinafter described and particularly defined in the claims. lnthe accompanying drawings Figure l. is a side elevation of a portion of a hill-anddale machine provided with the connection tube of the present invention; Fig. 2 is a plan of such machine; and Fig. 3 is a 1ongitudinnl section of the cementing tube between the tone tulle end the sound box taken on the line 33, Fig. 2.

The illustrated embodiment or? the inven tion is described as followsz-The cabinet 1 lllt'lDSES the motor and the horn. The tone tube 2 extends ironiihe horn up over the turn table or record carrying plate 3 upon which the record disk 4 is supported, in usual manner. A lateral cut record sound box 5 carries the sound diaphragm and the needle arin ii in which the needle 7 is supported in the usual manner. The connec-.

tion between the sound box and the tone tube forms the subject of this invention. This connection consists of a tube provided with twojoints, one having 2, horizontfl axis and the other a vertical axis, the former permitting the sound box to adapt itself to the height-end the inequalities of the record and the latter permitting the sound hon to follow the sound groove as the record is rotated loy swinging the sound hon and its supporting tube about such vertical axis joint. This tuhe connecting the sound hex undton-e tuheis called a connection tube, and is indicated in a general Way with, the reference character 10. The connection tube at its extreme end has provision for receiving and supporting lind holding the sound hot; in osition thereon. The sound hon enrry'ing he portion indicated by the reference character 11, is supper-ed on one arm of the elbow 12, the plane of which is parallel to-the plane of the disk record 4. The neer end 13 of the elbow 12 is jointed on a horizontal axis at 1" that is, on axis parallel to the surface of the disk record 4%, to the double joint section 15. The axis of the joint- 14 losing horizontal, the sound box 5 is permitted to adept itself to the surface oi": the record holding the needle 7 in the groove of the record by the weight ofthe sound hon, as is the practice in lateral out record machines Theioint 1 ofi'ords "being enlarged somewhat beyond the size of the tube so as to afford a full area assage for the sound waves. At the near on of the double joint section 15, the sectionis .provided with a cylindrical enlargement 16, the axis of which is vertical. The upper base 17 is perforated in the center ofthe cylindrical enlargement 16 and recelvcs therethrough the extreme end- 20 of the elbow 21 of the tube 10, the other arm 22- of which elbow is received in the tone tube 2. The lower base 23 of the cylindrical enlargement 16 is grooved, and in the groove are located a number of balls 24. The,end 20 of the elbow 21 is connected by means of a cage or transversely apertured portion 25 with'the stud 26 which passes thrpugh a central opening in the lower base 2,3 of the cylindrical enlargement 16. A bearing ring 27 embraces the stud 26 and engages the lower. surface of the balls 24, so the lower disk 23, balls 24 and the ring 27 constitute a ball bearing for the vertical joint of the connecting tube 10. The stud 26 is screwthreaded and the nut 30 holds the bearing ring27 in 30 the hearing may be adjusted to a nice fit. The cage 25 consists simply of two ba s connecting the end of the arm 20 of the elbow 21 with the stud 26. This cage, therefore, obstructs the vibration passage through the vertical axis joint very slightly, 4 and a clear, free passage is provided for the sound waves to pass from the sound hox to the tone tube.

By reference to Fig. 2', it will be seen that the vertical axis joint :8 afi'ords provision (for the lateral movement of the sound box across the face of the record, andthat the of new needles and for the purpose of removing 'it from the record and applying. it

thereto. It is to be observed that with the present construction of connecting tube it is- 7 not necessary thatthe tone tube should'be movement of the sound box and the needle across the record without the feeding movement being imparted to the-tone tube,

It is of importance that the vertical axis joint '8 should be one permitting extremely free movement of the sound box laterally across the record'disk,and while it is preferred to uses, hallbearing in this jointit is Within the piir'vie w of'the invention to use any lowfriction joint. The horizontal axis joint 14 should be one permitting'icomparatively free vertical movement of the sound box carried thereby, but inasmuch as the weight of the sound box is considerable, it will hold itself position. By adjusting the nut inroads in contact with the record with the requisite pressure without requiring the horizontal axis joint to be made of extreme low-tract on form, whereas with the vertical axls joint the action of gravity has no efiect upon the movement of the parts carried thereby, and being required to be actuated simply by the sound groove of the record, it is imperative that it should be offllow-frlctmn form. This invention is of great practical importance as it enables the possessorof a hilland-dale machine to play lateral cut records on it.

One of the features of this invention which contributes to the successful performance of its intended function resides in locating the vertical axis joint at such a distance front the needle point and providing it with such a low-friction bearing that the sound groove of the record disk will be Suficient to swing the connecting tube on the Eli vertical axis joint without undue wear on the sound groove. Another. feature of im- -.portance consists in locating the horizontal phonograph having-one end adapted to be connected with the tone tube and the other end adapted to be connected with the sound.

box, said tube having an elbow located in a vertical plane at one end and an elbow located in a plane at right angles thereto atv I .the other end and intermediate means whereby said sound'box is permitted to have free movement. duringreproduction, substantially as described;

2. A connection tube for hill-and-dale phonographs having a vertical plane elbow at the tone tube end, a horizontal plane elbow at the sound box end, a vertical axis joint near the tone tube end and a horizontal axis, joint between the vertical axis joint and the sound box, substantially as described.

3. A connection tube for hill-and-d-ale phonographs' having one end adapted to be connected to the tone tube, the other end adapted to be connected to a sound box, said tube being provided with a vertical axis joint near its tone tube end with a ball bear-' d. A connection tube for hill-and-dale n phonographs having one end afiapted'to be .cei-ved u; said enlargement so as to permit connected to the tone tube, the other en the free passage of sound waves there 10 adapted to carry the sound box provided through without material obstruction, subwith avertical axis low-friction joint near stantially as described.

the tone tube end, said vertical axis joint CHARLES P. TRUNDY. comprising an enlargement on one portion Witnesses: of the tube and a transversely apertured HORACE VAN Evnnnn,

member on the other portion of the tube re- Gno. E. Swimme- 

